Syringe.



t PATENTED' JUNE 2, `1903.

, J'. E. lSHEETS.

SYEINGE.

APPLICATION FILED MAB. 11,' 1903.

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UNITED STATES Patented June 2, 1903.`

JOHN H. SHEETS, OF NEW YORK, N. Y.

SYRINGE.

SPECIFICATION forming part of Letters Patent No. 730,054, dated June 2, 1903.

Application filed March l1, 1903. Serial No. 147,254. (No model.)

The invention relates vto syringes of the barrel-and-piston type; and-its object is to provide a new and improved. syringe arranged to permit of conveniently. filling the barrelewith the desired fluid and carrying the filled syringe about in a pocket, case, or the like and to allow the user to eject any desired portion of the fluid and safely retain the remainder of the fluid in the barrel for future The invention consists of novel features and parts and combinations of the same, as will be more fully'described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which similar' characters of reference indicate oorresponding parts in all the views.

Figure lis a sectional side elevation of the improvement, arranged for filling the barrel with a fuid. Fig. 2 is a like view of the same, showing the parts in position when a portion of the fluid is to be divided pff. Fig. -3 is a D, mounted to slide in a suitable bearing formed in a cap E, screwed or otherwise secured to the rear end of the barrel A. The outer end of the piston-rodD is provided with a suitable handle DT, adapted to be taken hold of by the operator for moving the piston C lengthwise in the barrel and for allowing the operator to turn the piston-rod in the pis- Fig-4L is a similar ton C, for the purpose hereinafter more fully described.

The inner end of the piston-rod D is provided with a fixed head D2, fitting a co'rrespondingly-shaped recess in the outer face of the piston C, so that when the piston-rod D is drawn Arearward the piston C is carried along in the same directionthat is, toward the cap E.

On the piston-rod D, adjacent to the inner face of the piston C, is secured a pin D3, adapted to abut against spaced shoulders C and Cformed onthe inner face of the said pistonv C, so that when the piston-rod D is pushed inward the pinD3 carries the piston C along, so that the latter is moved outward in the barrel. The pin D3, in addition to the function mentioned, serves to limit the turning motion of the piston-rod D in the piston C by the pin alternately abuttingagainst the said shoulders C and C2, as indicated in Figs. 3 and 4.

Thel piston-rod D is made hollow and provided Within theV piston C with a transverse partition D4, preferably standing at an angle to the axis of the piston-rod, as plainly l shown in Figs. l and 2. The partition D4 forms two passages D5 and D6 in the said piston-rod D, and the passage D5 opens into theforward nozzle or discharge end of the barrel A, while Athe other passage D6 connects with the atmosphere by aport D7 in the outer end of the piston-rod adjacent to the handle D.

In the Wall of the piston-rod D, opposite thesides of the partition'Dl, are arranged ports D8 and D9, adapted to register with a port O3, formed in the piston C and opening into theV storage or rear end of the 'barrel A,

.it being understood that when the port D8 registers with the port O3 (see Fig. 2) then connection is established between the forward and rear ends of thebarrel A by way of the passage D5 and the said registering ports D8 O3, so that the iiuid can pass from one end of the barrel'to 'the other on moving the piston correspondingly. When the several partsare in this position, then the pin D3 abuts against the shoulder C2', as indicated in Fig. 4. When the piston-rodD is turned in the piston C to the position shown in Figs. l and 3, then the port D9 is moved into register withthe port O3,

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so that the rear end of the barrel is connected with the atmosphere by way of the said registering ports C3 D, passage D, and the port D7.

The operation is as follows: When the several parts are in Athe position shown in Fig. l and the nozzle B is immersed in a fluid contained in a suitable vessel and the operator draws the piston-rod D outward, then the fluid is drawn into the barrel from the said vessel by way' of the nozzle B, and at the same time air in the rear end oi' the barrel A escapes from the latter by way of the registering ports C3 D9, passage D6, and port D7. 'Vhen the piston C has reached the rear end of the barrel A and the forward end thereof is completely filled with the fluid, then the operator moves the syringe into a reverse position to bring the nozzle B upward and then turns the piston-rod D to the position shown in Figs. 2 and 4 and then pushes the pistonrod D to cause the piston C to travel from the rear end of the barrel toward the nozzle B, and in doing so lthe fluid in front of the piston passes by way of the passage D5 and the registering ports D8 C3 into the rear end of the barrel. \Vhen the piston reaches the outer end of its stroke, then the operatorturns the piston-rod D to an intermediate position, so that both ports D0 and D8 are cut off from the port C3, and the fluid is now safely stored in the barrel A, as it cannot escape to the nozzle B nor to the rear end of the hollow piston C. The operator can now conveniently carry the syringe in a pocket, Satchel, or other receptacle without danger ot' spilling the fiuid stored in the barrel A. When it is desired to use a portion of the l'uid stored in the barrel A, then the operator turns the piston-rod D to the position shown in Figs. 2 and t, so that the ports D8 and C3 register with each other, and then draws the piston D outward, so that the portion of the stored fluid can liow from the rear endof the barrel A by way of the registering ports C3 and DS and the passage D5 into the front end of the barrel A, and when the desired quantity of fluid has passed into this front end of the barrel then the operator ,turns the piston-rod R to the position shown in Figs. l and 3 and then pushes the piston-rod D outward to cause the piston C to eject the iiuid in front of the piston through the nozzle B to the desired place. When the fluid has been ejected, then the piston D is again turned to an intermediate position, as previously explained, and the remaining fluid in the barrel A is kept therein until another ejection is to be made. The above-described operation is then repeated.

From the foregoing it will be seen that when the fluid is stored in the barrel A, as described, the piston C is in the forward end of the barrel A, and consequently the handle D of the piston-rod extends from the cap E, so that the syringe takes up comparatively little room.

Suitable packing devices may be employed for the piston C to prevent leakage between the piston and the barrel, and also suitable packings C4 may be employed between the piston-rod D and the piston, and in this case I prefer to use tubular cork packings G4, as indicated in Fig. 5.

If desired, an extra set of ports may be provided in the piston and pistonrod D, as shown at the upper left-hand portion in Fig. 5, to form the desired air-passage to the outer air. f Having thus described my invention, I claim as new and desire to secure by Letters Patentl. A syringe comprising a barrel, a piston movable therein, and a piston-rod connected with the said piston, to move the latter lengthwise in the barrel and allow of turning the piston-rod in lthe barrel, the said piston-rod and piston having ports adapted to register, to connect the nozzle end of the barrel with the rear or storage end and to connect the latter with the atmosphere, as set forth.

2. A syringe comprising a barrel, a piston movable therein and provided at the inner end with a port opening into the rear or storage end of the barrel, and a hollow pistonrod connected with the piston, to move the latter in the barrel and allow of turning the piston-rod in the piston, the said piston-rod havinga transverse partition and ports on opposite sides of the partition, adapted to register with the said piston-port, as set forth.

3. A syringe comprising a barrel, a piston movable therein and provided at the inner end with a port opening into the rear or storage end of the barrel, and a hollow pistonrod connected with the piston, to move the latter in the barrel and allow of turning the piston-rod in the piston, the said piston-rod having a transverse partition and ports on opposite sides of the partition, adapted to register with the said piston-port, the partition being set at an angle to the axis of the pistonrod, as set forth.

4. A syringe comprising a barrel, a piston movable therein, a hollow piston-rod connected with the said piston, to move the latter lengthwise in the barrel and to allow of turning the piston-rod in the barrel, the said piston-rod and piston having ports adapted to register, and to connect the nozzle end of the barrel with the rear or storage end, and to connect the latter with the atmosphere, and means for limiting the turning motion of the piston-rod on the piston, as set forth.

5. A syringe comprising a barrel, a piston movable therein and provided at the inner end with a port opening into the rear or storage end of the barrel, and a hollow piston-rod connected with the piston, to move the latter in the barrel and to allow of turning the piston-rod in the piston, the said piston-rod having a transverse partition and ports on opposite sides of the partition, adapted to register with the said piston-port, one end of the ICO TIO

hollow piston-rod opening into the discharge sides of the partition, adapted to register or nozzle end of the barrel and the other or with the said piston-port, and means'for limouter end openinginto the air, as set forth. iting the turning motion of the said piston- 6. A syringe comprising a barrel,v a piston rod in the piston, as set forth. I5 5 movable therein and provided at the inner In testimony lwhereof I have signed my end with a port opening into the rear orstornaine to this specification in the presence of age end of the barrel, a hollow piston-rod contwo subscribing witnesses. neeted with the piston, to move the latter in JOHN H.'SHEETS. the barrel and to allow of turning the piston- Witnesses: f xo rod in the piston, the said piston-rod having THEO. G. HOSTER,

a transverse partition and ports on opposite v EVERARD BOLTON MARSHALL.l 

